Lamp-socket.



J. DARBY.

LAMP SOCKET.

APPLICATION FILED MAR. 12, 1910.

1 ,1 1 9,928. Patented Dec. 8, 1914.

Pym

JOHN DARBY, OF SUMMIT, NEW JERSEY.

LAMP-SOCKET.

Specification of Letters Patent.

Patented Dec. 8, 1914.

Application filed March 12, 1910. Serial No. 548,831.

To all whom it may concern:

Be it known that I, JOHN DARBY, a citizen of the United States, residing in Summit, in the county of Union and State of New Jersey, have invented new and useful Improvements in Lamp-Sockets, of which the following is a specification.

The invention relates to electric lamp sockets and more especially in certain features to sockets having a double pole and double break to control the current, althought in certain of its features the invention is applicable to other kinds of sockets.

The objects of the invention are in part set forth hereinafter and will in part be obvious to those skilled in the art.

The invention consists in the novel parts, articles, arrangements, constructions, combinations and improvements herein shown and described.

The accompanying drawings, referred to herein and forming a part hereof, illustrate one embodiment of the invention, the same serving in connection with the description herein to explain the principles of the invention.

()f the drawings: Figure l is an elevation of a lamp socket, with one socket head in section, constructed in accordance with the principles of the invention, and substantially on the line AB of Fig. 2 looking in the direction of the arrows; Fig. 2 is a central section through Fig. 1 perpendicular to the plane of the paper, and looking to the right, but with the controller and contacting parts shown in elevation; Fig. 3 is a top plan of the controller, its actuating means and associated part, and corresponds substantially to a top plan of Fig. 1 with the upper socket head and its binding posts removed; Fig. 4 is a sectional plan on the line C- l) of Fig. 1 and shows the detent piece and detent spring in detail; Fig. 5 is an enlarged perspective of the supporting standards, the controller support and the controller actuating means; Fig. 6 shows a top plan and an elevation of the controller; Fig. 7 is a top plan of the controller showing the brushes; Fig. 8 is a perspective detail of one of the brushes; Fig. 9 is an elevation of the socket head showing the manner of mounting the binding posts, and the protecting ears for wire connections; and Fig. 10 is an elevation of socket head looking at Fig. 9 from the right-showing channel for chain protection and recess for removal of funnel.

Referring to the, accompanying drawings, which illustrate by way of example, one embodiment the invention, a head 1 is shown and also a head 2 with a suitable supporting connection therebetween. According to one feature of the invention the said supporting and connecting structure is in one piece comprising the standards 3 and 4 and the cross member 5 shown provided with the screw holes (3 and. 7 which serve to fasten it to the head 1 by screws and S) or other suitable fastening devices. The head 1 may be channcled to receive the part 5, as shown in Fig. '2 of the drawings. The standards 3 and -'l are shown provided at their other ends with transverse portions 10 and 11 provided with suitable apertures into which the screws 12 and 13 are threaded to connect the standards to the head 2.

T he socket provides a double pole, double break current control; that is. each branch of the circuit is broken and made at two points separated from each other. A con tact piece 20 of angled form is shown resting in the channel 21 in the socket head 1 and connecting electrically by means of the screw 22 with the screw shell 23 which rc ceivcs the lamp base. A similar angled con tact piece 24 is shown at the opposite side of the socket 1 and this also may rest in the channel 25 in the socket head 1. The con tact piece 24 connects electrically by means of the screw 26 with the center contact 27 hich connects to the central lamp terminal. Two opposing contact pieces are provided, the contact piece 30 likewise shown of angled form extending toward and in alinement with the contact 20. The portion 31 is shown bent at right angles and is supportcd'in the head 2 by the screw 32. Said contact piece serves also as a'binding post, the binding screw 33 being threaded thereinto to hold and make contact with the line terminal 34. The head '2 is shown grooved or recessed at and as having extending cars 30 and 37 on either side of the binding post 30. This permits the line wire to be brought down and held within the socketstructure, and to be. protected thereby. The contact piece 40 is likewise shown opposite and extending toward the contact piece 24 on the opposite side of the sou -act. The angled part ll is shown held to the head :3 by the screw 42. lhe line wire terminal iii is shown passing down through the grmii'e H and fastened to the member ll) by the binding screw li'i, eorrespoiiding ears or projections being provided, the car 4? being shown in l ig. 2 of the drawings.

A controller is shown mounted. substarr tially centrally oi the socket and with its axis arranged parallel or co triiwith the soclu-t axis. '1 he controller is shonn consisting of a disk 5d of insulating material hav ing a four toothed ratchet 5t and a tour laced detent part integral therewith. 'lhe controller is shown rotatably mounted on the stud shalt 53 carried in the aperture 5 in the part 5 of the connecting structure and having its head 55 carried in a recess in the socket head 1, thus giving a firm and steady mounting for the stud shaft. The shai't is shown projecting into but not through the controller. The lower face ol' the detent piece is shown resting upon the upper face of the part 5 and rotating thereon, Figs. 1 and A suitable detent member, such as a spring 56, is shown coacting with the detent piece Brushes and 61 are provided upon the controller 50, these brushes being shown with two contact faces (32 and (33 which are separated so as to have an independent spring action, one coacting with one contact piece and the other with the opposed contact piece. This will give a firm clean contact with each of the Contact pieces whether they be exactly in alinement or not. The contact pieces are shown with body portions (34; and (15, respectively, terminating in an angled part 66 and 67 which lits into the kerls (l8 and (59 in the controller 50. l he pa ts iii and (37 are also provided at either side with ears 70 which may be bent down into recesses 71 upon the controller body to firmly hold the brushes in position. The brushes are thus inexpensively made, and easily, rapidly and economically assembled with the controller and are lirnily and accurately held in position. The actuating means for the controller is, in the present embodiment. likewise supported from the connect ing structure for the socket head, and also provides for a direct and straight line pull for the chain. As embodied herein a stipport and guide 7 1 is shown supported upon the standards and 4- and carrying a pawl piece 76 shown of generally flat form and withthe proitattioiis T7 and 78 bent up therefrom and having apertures 79 and 80 through which the support and guide 75 pas. .s loosely. The pawl piece 76 is provided with a pawl tooth t l at one side thereof, and is acted on by a suitable spring to return it to initial position alter it has been actuated.

In rigs. l and a spring is shown car i about tin: sapport T5 several torsional i. ists being made in the spring and one of its extending ends beingliooked in a recess oi the ear "('1' oi pawl piece 76, and the other end booked in a recess otstandard 3. "I has the torsional strain in the spring will serve to throw the pawl 81 into engagement with the ratchet and allow it to yieldingly slip over the ratchet on the return niovemeat of the pawl piece. In tlie,,einbodicd lorni also the actuator travels and is guided along a path substantially across the axis of the controller. In Fig. 5 a spring at is shown engaging the pawl piece 76 at the op posite side from the pawl tooth b1, the

other end of said spring being attached to the standard 4., hither .arrangenic'nt of the spring throws the pawltooth positively down upi: l the.,l'ace of the ratchet 51 so as to insure the actuation of the controller under the pull of the chain and still allows it to Yield easily upon the return inoveruent.

The chain funnel J0 is shown mounted in a slot 91 at the angle joining the standard and the bent part 10 thereof, the part it) having an enlarged slot J2 therein. The inner end of the funnel $30 is enlarged or flared so :nto slip into the enlarged part will) no? anus to hold the funnel from iiiilliff pulled. outwardly, while the socket head 2 is shown recessed at 100 to allow the ready removal of the funnel'after assembling, the outer shell casing prevents vertical movement. The projection 77 is shown slotted at 93 to support the chain 94, and the projection 78 is shown slotted and curved at J5 (see Figs.. l and 5) to firmly hold the end of the chain. In Fig. ll) portions 101 and 102 of the socket head 2 are shown projecting on either side of the chain (see Figs. 1, 2 and 10$,ivhereby the chain is prevented, should it ever be run up slack, from dropping down and possibly short circuiting the socket. In said figure the chain Ill. and guide 75 are shown in outline in order to make clear the relation of the parts just described.

By the present invention a socket is provided which is ot exceedingly few parts, which are strongly constructed, which are easily assembled, and which are positive and simple in their operation, and in which a dirert chain pull rrovided for the actu- :iting means. and wherein the gapage available is extraordiiiarili' large, while at the same tinfe the entire socket is very small and compact. thus making the socket safe for extraordinar heavy currents. A strong and quick .:ii action with a win ing contact and a sudden break is also proidedf by the arraug nient ol" the brushes and the delimit.

The invent-ion limited to the exact What I do claim and desire to secure by 1 Letters Patent, is: I

l. A lamp socket including in combination a rotatable controller, a ratchet integral therewith, a guide arranged in a .straight line, at right angles to theaxis of thecontroller and, past the face of" the ratchet wheel, a pawl traveling along said guide, and connections for moving the pawl.

2. A lamp socket including in combination a stub shaft, a controller rotatably mounted thereon, and a ratchet. on the end of the controller, and a guide extending past the end of the controller and a pawl traveling along said'guide and the free end of said shaft engaging said ratchet. v

3-. .A lamp socket including in combination a stub shaft, a controller rotatably mounted thereon, and a. ratchet olrtlie end of the controller, and a guide extending in a right line-past thcend .of' the controller and a pawl traveling along said guide and the free end of said shaft engaging said ratchet.

4.. -A lamp socket including in combina-' tion opposed socket heads, a controller, shorter than the distance between said heads, rotatably mounted upon one of..,said heads only, thereby leaving a free spade be tween the controller and the other head, a guide arranged in said free space and -actuating means for saidv controller traveling on said guide in said free space.

5. A lamp socket including in e0mhination opposed socket heads, a controller, shorter than the distance between said heads, rotatably mounted uponone of said heads only, thereby leaving a free space between the controller and the other head, a guide arranged in said free space, a ratchet 0n the-free end of said controller, and a pa\\-'l.-tra\'eling on said guide across the socket in said free space, the pawl engaging the ratchet.

' .6. A'lamp socket including in combina tion two opposed heads, supporting COIlIltC- tions therebetween, a controller rotatably supported from one of said heads only, leaving a free space between the end of the controller and the other head, a guide supportcd between said supporting connections in said free space and actuating means for the controller traveling along said guide.

7. A lamp'socket including in combina tion two opposed heads, supporting connections therebetween, a controller rotatably supported from one of said heads only, leaving a free space between the end of the controller and the other head, a guide sup ported between said supporting connections in said free space, a pawl member sliding along said guide, and a ratchet fixed to the said pawl.

free end of the controller and engaged by 8. A lamp socket including in combina-' tion, a cylindrical lamp socket, a cylindrical controller mounted concentrically within the socket, a pair of contacts at one side of said socket, said contacts being in. one branch of the circuit, and one connecting to the line and the other to the lamp, a' pair of contacts on the opposite side of the socket and also of the'controller, said pair of contacts being in the other branch of the circuit, and one of them connecting to the line and the other to the lamp, two brushes mounted 'onthe periphery of said controller, eachbrush connecting the two contacts of a pair at alternate actuations of the controller. r

9. A lamp socket including in combination the socket heads,'and-a support between the. socket heads extending diametrically thereof, a controller mounted on the stub shaft,

an actuator for said controller, and a guide upon which said actuator travels, said guide being-mounted transversely of the socket 7 upon said support. 7

10. A lamp socket including in combination the socket heads, two standards connecting said heads at points substantially a diameter apart, a guide supported across the socket on said standards, a pawl piece moving on said guide, a controller and a ratchet thcrefor engaged said pawl.

11. A lamp socket including in combination .two socket heads, two standards connecting said heads at points substantially a diameter apart, a controller rotatably supported fromone of said heads -only, lea'v'- ing a free space between the end of the controller and the other head,'a guide arranged across the socket andhaving its ends. sup

ported-in said standards,'apawl piece mov-- ing along said guide, a ratchet at the end of said controller and engaged by said pawl. 12. A lamp socket including in comb1nation two opposed heads, a single strip bent.

a support carried by said strip and a con-- troller rotatably mounted thereon.

14. A lamp socket including in combination two opposed heads, a single strip formed to provide two standards substantially. diametrically opposite each other, said strip? being fastened to both of said heads,

.a support carried controller on said strip and a controller actuator traveling on saidl'guide.

16. In a lamp socket, a guide, a pawl carryiirg member slidable along said guide. and capable of a slight rocking motion relatively to the guide, a ratchet adj acent to said guide and pawl piece, and means for rocking said member during its sliding motion along the guide wherebythe pawl 'is'thi'own into engagement with the ratchet.

17. In a lamp socket, a guide, a pawl adapted tolslide along and to rock about said, guide, and means tending to slide the pawl along the'guide and to rock it about the guide.

18. In a lamp socket, a guide, a pawl adapted to slide along and to rock about said guide, means tending to'slide the pawl along the guide and to rock it about the guide, and a rotatingratchet cooperating with said pawl.

11). A ldmp socket including in combination a cylindrical socket, a rotatable eylin'- drical controller substantially concentric with'the socket, two contacts at one sideo't the socket, two contacts onthe opposite side of vthe sock t, a brush carried on-thc side of the controll r to connect the contacts on one side and a. brush ontlie opposite side of the controller to connect the two opposite contacts."

:20. In a lamp socket a straight guide, a memberslidable along said guide and having a slight transverse rocking movement relatively to the guide, a chain for pulling said member in the direction of the guide, a pawl carri l bysaid member at one side from the i; 7 guide a ainst the pnmofthe chain, and a ratchet ier the pawl. I

21. In a lamp socket a controller of insulating material, a plurality of recesses therein, and a metal brushprojecting from said controller, and bent into said recesses to hold the brush in place on the controller.

'22. A lamp socket including in combinauide, a s'pri'ngf acting on said' tion two opposed heads, a controller, a guide, an actuator ,for the controller moving along said guide, a pull chain connectedto the actuator, and projections on the socket head at each side of the chain which co operate with said guide to prevent the chain dropping on the controller.

23. In a lamp socket, two socket heads, a

saandard connecting said heads, an angled portion in said standard, aslot at said angle baring a narrow portion in said standard and a wide portion. in said angled part,

- and a chain Funnel having a groove there-.

in fitting in the narrow portion of the slot and an enlarged part fitting and passing through the wide portion of the slot.

all. In a lamp. socket, a controller, a' ratchet, a guide, a pawl loosely mountedupon and sliding along said guide, and a spring acting both topress the pawl along the guide and to turn it down into engagement with the ratchet. 1

3 A. lamp'socket including in combination a guide, a pawl carrying member slidable along said guide and capable of a slight rocking motion about said guide, means for sliding said pawl carrying member along said guide, and a spring acting against said sliding movement and also tending to rock said pawl about said guide, for said pawl.

26. A lamp socket including in combination a cylindrical controller, having. a.

and a: ratchet ratcliet'at one end thereof, a guide adjacent to said end, a pawl carrying member slidable along and rockable about said guide, a spring tending to slide and rock said pawl carrying member, and hand actuated means for sliding said pawlcarrying member 

